﻿using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.ApplicationModel.Background;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;

// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234238

namespace LiveTiles
{
    /// <summary>
    /// An empty page that can be used on its own or navigated to within a Frame.
    /// </summary>
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
        }

        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
           base.OnNavigatedTo(e);

           RegisterBackgroundTask();
        }

        private async void RegisterBackgroundTask()
        {
           var backgroundAccessStatus = await BackgroundExecutionManager.RequestAccessAsync();
           if (backgroundAccessStatus == BackgroundAccessStatus.AllowedMayUseActiveRealTimeConnectivity ||
               backgroundAccessStatus == BackgroundAccessStatus.AllowedWithAlwaysOnRealTimeConnectivity)
           {
              foreach (var task in BackgroundTaskRegistration.AllTasks)
              {
                 if (task.Value.Name == "LiveTileTask")
                 {
                    task.Value.Unregister(true);
                 }
              }

              var taskBuilder = new BackgroundTaskBuilder();
              taskBuilder.Name = "LiveTileTask";
              taskBuilder.TaskEntryPoint = "LiveTiles.Tasks.LiveTileTask";
              taskBuilder.SetTrigger(new TimeTrigger(15, false));
              var registration = taskBuilder.Register();
           }
        }
    }
}
